The Tole Of Separator In Lithium Batteries

In the structure of lithium batteries, the separator is one of the key inner layer components. The performance of the lithium battery separator determines the interface structure and internal resistance of the battery, which directly affects the capacity, cycle and safety performance of the battery. The separator with excellent performance plays an important role in improving the overall performance of the battery.

The main function of the lithium battery separator is to separate the positive and negative electrodes of the battery to prevent short circuit due to contact between the two electrodes, and also has the function of allowing electrolyte ions to pass through.

The separator material is non-conductive, and its physical and chemical properties have a great impact on the performance of the battery. Different types of batteries use different separators.

For the lithium battery series, since the electrolyte is an organic solvent system, a separator material resistant to organic solvents is required, and a high-strength thin-film polyolefin porous membrane is generally used.